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The mean of 20 observations is 15. On ch...

The mean of 20 observations is 15. On checking, it was found that two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 4, then the correct mean is.
(a)15
(b)15.15
(c)15.35
(d)16

A

15

B

15.15

C

15.35

D

16

Text Solution

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The correct Answer is:
B
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